// Copyright 2020 The XLS Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

fn main() -> u32 {
    let x0 = clz(u32:0x0005a000);
    let x1 = clz(x0);
    clz(x1)
}

#[test]
fn ctz_test() {
    assert_eq(u32:27, main());
    assert_eq(u3:2, ctz(u3:0b100));
    assert_eq(u3:1, ctz(u3:0b010));
    assert_eq(u3:0, ctz(u3:0b001));
    assert_eq(u3:0, ctz(u3:0b111));
    assert_eq(u3:3, ctz(u3:0b000));
}
